Improvement in circular-saw mills



w. BOWMAN. 1 Circular Saw Mill.' No.'107,861. Patented Oct. 4, 187.0.

N, PETER-5. Phnln-uihawlwr. ramm n. c.

i To an whom ttjnay concern a be raised and lowered. p

a a A friction-pulley, Y, is fastened to the shaft 0, outside of thestandard N, and so that it maybe brought in contact .withthe wheel gamutattire;

f vvtttmixt BoWMaN oF ,ETNA GREEN, INDIANA.

" Letters latent N0 107,861,da,ted0ct0ber,4, 1870.

"lM PROVEMENT lN CIRCULAR-SAW MILLS. Q

r The Schedule referred to in these Letters Patent: and making part ofthe same.

Be it? known that 1, WILLIAM BOWMAN, of Etna Green, in the countytv-ofKosciusko, and State of Intliana, ,have invented an Improvement inCircular- Saw Mills; and I dohereby declare that the following is a fulland exactdeseription thereof, which will.

Figure 3,anelevation offthe band-wheels and two vfriction-rollerseniployedin my device' Figura a lever for operating friction-wheels.

The present improvement consists in applying such mechanism to theordinarycircnlar-saw mill as will greatlylfacilitate the rolling andturning of logs on the carriage, as herelnafterfully described. f

fl" Q N N rcpresentthe frame-work;

M l, the main shafts;

n \V, the band-wheels; and I L, the u pperrsawof an ordinarycircularl-saw mill. in the standardsN N1 of the fi'ame-\vork*are formedbearings for ash-aft, O, to rotate in, the bearing in standard N being,vertically slotted, as shown at fig. l 2, so that theend of the shaftrunning therein'may n, or raised up from it, by means ofa lever, T" lThis lever is pivoted to the standard N at V, fig. 1, and, as shown atfig. 4, it has a slot in it, through whichthe shaft O'passes, so that,by hearing down q'go'n the end of the lever, the wheel a will rotate thewheel'Y, and so that the wheel Y will be removed from wheel a when thelever T is raised,'and placed on the stopR, fig. 1.

On the shaft 0- is placed a 'pnlley, U, which, in j practice, should hea clutch-pulley, so that a {chain may drive a wheel, G,so fixed to adrum-shaft, E, I j a which, in practice, should have hearings independent bridges, fastened to the loft of the mill, instead of thestandards D, as shown in fig." 1. l

' Arope, F, is fastened to the drum-shaft E, and put over a loosesheave-block, B, which, in practice," instead of being fastened to anadjnstablearnn' x A, is fastenedin any desired place in the loft of themill,f so that the rope F may be hitched to a log in any de'- qsiredplace. To roll a log onto the carriage J, a rope, F, must; a

first be fastened to it, and the lever '1 brought down,

so that the friction-wheelY will be rotated thei wheel 11, and heldthere until. the log is movedthe 5 The operation is the same to'thrnproper distance. a log on the carriage.

In order to runthe rope F out, a fi'ict-ion-roller, t, fig. '3, ispivoted to a movable arm, Z, and to the arm is fixed a rod, 1), so that,when it is desired to run the drum E, the roller Z is brought betweenwheels Y and n, by simply pulling the rod 1; forward, as shown by dottedlines q.

' As a whole, by testing the device practically, it is foundto operatein every respect satisfactorilly, and save the labor of several hands inhandlinglogs, while, at the same time, the cost of applying it to a millis small.

i 7 Claim.

In arranging a circular-saw mill for loading and turning logs onacarriage, the combination of the shaft 0, pulleys U Y, friction-rollerZ, drum E, wheel G, rod 1), lever T, adjustable sheave-block B, and ropeF, asset forth.

Witnesses: WILLIAM BOWMAN.

G. L. CHAPIN,

E. Gmson.

